Transcript Respiratory System - Waterford Public Schools

Respiratory
System
Respiration
The energy
releasing process
that is fueled by
oxygen.
Function of the
Respiratory
System
To get oxygen into the
body & remove carbon
dioxide and water from
the body.
Diagram of Upper & Lower
Respiratory Systems
UPPER RESPIRATORY
SYSTEM
• nose
• nasal cavity
• pharynx
The Nose
• Air enters through 2
openings called nostrils
• Wall of cartilage
separates the 2 nostrils
• Air is heated by warm
blood flowing through
blood vessels in the
lining of the nasal
cavities
• Mucus keeps air moist
& keeps tissues from
drying out
The Nose Continued
• Mucus along with little hairs
called cilia trap tiny particles
entering the nose
• These cilia also sweep old
mucus towards the esophagus
& down to the stomach where
it is destroyed by hydrochloric
acid
CILIA
Lower
Respiratory
System
•
•
•
•
•
Larynx
Trachea
Bronchi
Bronchioles
Alveoli
The Anatomy of the Larynx
(voicebox)
Trachea
(windpipe)
Bronchus
Bronchus
bronchioles
bronchioles
alveoli
alveoli
diaphragm
Diaphragm
Main
muscle
used in
breathing
Diaphragm
• Dome-shaped muscle at the bottom of the lungs.
• When you breathe in, the diaphragm contracts
and flattens out while pulling downward. This
movement enlarges the space that the lungs are
in. This larger space pulls air into the lungs.
• When you breathe out, the diaphragm relaxes
reducing the amount of space for the lungs and
forcing air out.
• The diaphragm is the main muscle used in
breathing.